Thanks krunox123 and Lasergun!
Is there similar site for litecoin?
And I see it's not so easy like myetherwallet.com for example.
This is not a proper way to use Bitcoin. You are molesting yourself and it's very likely you'll make some mistake. Choose a wallet here:
https://bitcoin.org/en/choose-your-walletTechniques described above are extreme usage cases, by people who are around cryptocoins for a long time and who know exactly why are they doing it the hard way.